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(.module:
[lux #*
["_" test (#+ Test)]
[abstract
[monad (#+ do)]
["." equivalence]
{[0 #spec]
[/
["$." equivalence]
["$." functor (#+ Injection)]]}]
[control
["." try]
["." exception]]
[data
["." maybe]
[number
["n" nat]]
[collection
["." list ("#@." functor)]]]
[math
["." random]]]
{1
["." /]})
(def: injection
(Injection (/.Dictionary Nat))
(|>> [0] list (/.from-list n.hash)))
(def: for-dictionaries
Test
(do random.monad
[#let [capped-nat (:: random.monad map (n.% 100) random.nat)]
size capped-nat
dict (random.dictionary n.hash size random.nat capped-nat)
non-key (|> random.nat (random.filter (function (_ key) (not (/.contains? key dict)))))
test-val (|> random.nat (random.filter (function (_ val) (not (list.member? n.equivalence (/.values dict) val)))))]
($_ _.and
(_.cover [/.size]
(n.= size (/.size dict)))
(_.cover [/.empty?]
(case size
0 (/.empty? dict)
_ (not (/.empty? dict))))
(_.cover [/.new]
(let [sample (/.new n.hash)]
(and (n.= 0 (/.size sample))
(/.empty? sample))))
(_.cover [/.entries /.keys /.values]
(:: (list.equivalence (equivalence.product n.equivalence n.equivalence)) =
(/.entries dict)
(list.zip/2 (/.keys dict)
(/.values dict))))
(_.cover [/.merge]
(let [merging-with-oneself (let [(^open ".") (/.equivalence n.equivalence)]
(= dict (/.merge dict dict)))
overwritting-keys (let [dict' (|> dict /.entries
(list@map (function (_ [k v]) [k (inc v)]))
(/.from-list n.hash))
(^open ".") (/.equivalence n.equivalence)]
(= dict' (/.merge dict' dict)))]
(and merging-with-oneself
overwritting-keys)))
(_.cover [/.merge-with]
(list.every? (function (_ [x x*2]) (n.= (n.* 2 x) x*2))
(list.zip/2 (/.values dict)
(/.values (/.merge-with n.+ dict dict)))))
(_.cover [/.from-list]
(let [(^open ".") (/.equivalence n.equivalence)]
(and (= dict dict)
(|> dict /.entries (/.from-list n.hash) (= dict)))))
)))
(def: for-entries
Test
(do random.monad
[#let [capped-nat (:: random.monad map (n.% 100) random.nat)]
size capped-nat
dict (random.dictionary n.hash size random.nat capped-nat)
non-key (|> random.nat (random.filter (function (_ key) (not (/.contains? key dict)))))
test-val (|> random.nat (random.filter (function (_ val) (not (list.member? n.equivalence (/.values dict) val)))))]
($_ _.and
(_.cover [/.contains?]
(list.every? (function (_ key) (/.contains? key dict))
(/.keys dict)))
(_.cover [/.get]
(and (list.every? (function (_ key) (case (/.get key dict)
(#.Some _) true
_ false))
(/.keys dict))
(case (/.get non-key dict)
(#.Some _) false
_ true)))
(_.cover [/.put]
(and (n.= (inc (/.size dict))
(/.size (/.put non-key test-val dict)))
(case (/.get non-key (/.put non-key test-val dict))
(#.Some v) (n.= test-val v)
_ true)))
(_.cover [/.try-put /.key-already-exists]
(let [can-put-new-keys!
(case (/.try-put non-key test-val dict)
(#try.Success dict)
(case (/.get non-key dict)
(#.Some v) (n.= test-val v)
_ true)
(#try.Failure _)
false)
cannot-put-old-keys!
(or (n.= 0 size)
(let [first-key (|> dict /.keys list.head maybe.assume)]
(case (/.try-put first-key test-val dict)
(#try.Success _)
false
(#try.Failure error)
(exception.match? /.key-already-exists error))))]
(and can-put-new-keys!
cannot-put-old-keys!)))
(_.cover [/.remove]
(and (let [base (/.put non-key test-val dict)]
(and (/.contains? non-key base)
(not (/.contains? non-key (/.remove non-key base)))))
(case (list.head (/.keys dict))
#.None
true
(#.Some known-key)
(n.= (dec (/.size dict))
(/.size (/.remove known-key dict))))))
(_.cover [/.update]
(let [base (/.put non-key test-val dict)
updt (/.update non-key inc base)]
(case [(/.get non-key base) (/.get non-key updt)]
[(#.Some x) (#.Some y)]
(n.= (inc x) y)
_
false)))
(_.cover [/.upsert]
(let [can-upsert-new-key!
(case (/.get non-key (/.upsert non-key test-val inc dict))
(#.Some inserted)
(n.= (inc test-val) inserted)
#.None
false)
can-upsert-old-key!
(case (list.head (/.entries dict))
#.None
true
(#.Some [known-key known-value])
(case (/.get known-key (/.upsert known-key test-val inc dict))
(#.Some updated)
(n.= (inc known-value) updated)
#.None
false))]
(and can-upsert-new-key!
can-upsert-old-key!)))
(_.cover [/.select]
(|> dict
(/.put non-key test-val)
(/.select (list non-key))
/.size
(n.= 1)))
(_.cover [/.re-bind]
(or (n.= 0 size)
(let [first-key (|> dict /.keys list.head maybe.assume)
rebound (/.re-bind first-key non-key dict)]
(and (n.= (/.size dict) (/.size rebound))
(/.contains? non-key rebound)
(not (/.contains? first-key rebound))
(n.= (maybe.assume (/.get first-key dict))
(maybe.assume (/.get non-key rebound)))))))
)))
(def: #export test
Test
(<| (_.covering /._)
(_.with-cover [/.Dictionary])
(do random.monad
[#let [capped-nat (:: random.monad map (n.% 100) random.nat)]
size capped-nat
dict (random.dictionary n.hash size random.nat capped-nat)
non-key (|> random.nat (random.filter (function (_ key) (not (/.contains? key dict)))))
test-val (|> random.nat (random.filter (function (_ val) (not (list.member? n.equivalence (/.values dict) val)))))]
($_ _.and
(_.with-cover [/.equivalence]
($equivalence.spec (/.equivalence n.equivalence)
(random.dictionary n.hash size random.nat random.nat)))
(_.with-cover [/.functor]
($functor.spec ..injection /.equivalence /.functor))
..for-dictionaries
..for-entries
))))
|
